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From: Raz Amir <razamir22@gmail.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH v4] pci: save list of detached devices, and re-probe during driver unload
Date: Thu,  5 Mar 2015 18:24:23 +0200	[thread overview]
Message-ID: <1425572663-22299-1-git-send-email-razamir22@gmail.com> (raw)
In-Reply-To: <1424932400-66862-1-git-send-email-razamir22@gmail.com>

Added code that saves the pointers to the detached devices, during
driver loading, and during driver unloading, go over the list,
and re-attach them by calling device_probe_and_attach
on each device.

Signed-off-by: Raz Amir <razamir22@gmail.com>
---
 lib/librte_eal/bsdapp/nic_uio/nic_uio.c | 34 ++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/lib/librte_eal/bsdapp/nic_uio/nic_uio.c b/lib/librte_eal/bsdapp/nic_uio/nic_uio.c
index 5ae8560..7a4ed5d 100644
--- a/lib/librte_eal/bsdapp/nic_uio/nic_uio.c
+++ b/lib/librte_eal/bsdapp/nic_uio/nic_uio.c
@@ -55,6 +55,9 @@ __FBSDID("$FreeBSD$");
 
 #define MAX_BARS (PCIR_MAX_BAR_0 + 1)
 
+#define MAX_DETACHED_DEVICES	128
+static device_t detached_devices[MAX_DETACHED_DEVICES] = {};
+static int num_detached = 0;
 
 struct nic_uio_softc {
 	device_t        dev_t;
@@ -288,17 +291,38 @@ nic_uio_load(void)
 		function = strtol(token, NULL, 10);
 
 		dev = pci_find_bsf(bus, device, function);
-		if (dev != NULL)
-			for (i = 0; i < NUM_DEVICES; i++)
-				if (pci_get_vendor(dev) == devices[i].vend &&
-						pci_get_device(dev) == devices[i].dev)
-							device_detach(dev);
+		if (dev == NULL)
+			continue;
+		
+		for (i = 0; i < NUM_DEVICES; i++)
+			if (pci_get_vendor(dev) == devices[i].vend &&
+					pci_get_device(dev) == devices[i].dev) {
+						if (num_detached < MAX_DETACHED_DEVICES) {
+							printf("nic_uio_load: detaching and storing dev=%p\n", dev);
+							detached_devices[num_detached++] = dev;
+						}
+						else
+							printf("nic_uio_load: reached MAX_DETACHED_DEVICES=%d. dev=%p won't be reattached\n",
+								MAX_DETACHED_DEVICES, dev);
+						device_detach(dev);
+			}
 	}
 }
 
 static void
 nic_uio_unload(void)
 {
+	int i;
+	printf("nic_uio_unload: entered ... \n");
+
+	for (i = 0; i < num_detached; i++) {
+		printf("nic_uio_unload: calling to device_probe_and_attach for dev=%p...\n",
+			detached_devices[i]);
+		device_probe_and_attach(detached_devices[i]);
+		printf("nic_uio_unload: done.\n");
+	}
+
+	printf("nic_uio_unload: leaving ... \n");
 }
 
 static int
-- 
2.1.2

  parent reply	other threads:[~2015-03-10 13:48 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-26  6:33 [dpdk-dev] [PATCH] " Raz Amir
2015-03-01 13:48 ` Neil Horman
2015-03-01 14:21   ` Raz Amir
2015-03-01 17:16     ` Neil Horman
2015-03-02  8:18       ` Raz Amir
2015-03-02 11:36         ` Neil Horman
2015-03-02 11:58           ` Raz Amir
2015-03-02 13:29             ` Thomas Monjalon
2015-03-03 11:30               ` Raz Amir
2015-03-03 11:45                 ` Bruce Richardson
2015-03-03 12:56                   ` Raz Amir
2015-03-03 13:32 ` Bruce Richardson
2015-03-04  9:07   ` Raz Amir
2015-03-04 10:13     ` Bruce Richardson
2015-03-04 10:28       ` Raz Amir
2015-03-04 11:15 ` [dpdk-dev] [PATCH v3] " Raz Amir
2015-03-09  8:07   ` Raz Amir
2015-03-09 10:27     ` Bruce Richardson
2015-03-10  8:15       ` Raz Amir
2015-03-04 11:47 ` [dpdk-dev] [PATCH v2] " Raz Amir
2015-03-05 14:59 ` [dpdk-dev] [PATCH v4] " Raz Amir
2015-03-05 16:24 ` Raz Amir [this message]
2015-03-11 10:26   ` Bruce Richardson
2015-03-12 12:24     ` Raz Amir
2015-03-16 16:29       ` Thomas Monjalon
2015-07-08 22:51         ` Thomas Monjalon

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